65161087 has 4 divisors (see below), whose sum is σ = 65295376. Its totient is φ = 65026800.

The previous prime is 65161081. The next prime is 65161121. The reversal of 65161087 is 78016156.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65161087 - 2³ = 65161079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65161081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66414 + ... + 67387.

It is an arithmetic number, because the mean of its divisors is an integer number (16323844).

Almost surely, 2^65161087 is an apocalyptic number.

65161087 is a deficient number, since it is larger than the sum of its proper divisors (134289).

65161087 is a wasteful number, since it uses less digits than its factorization.

65161087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134288.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 65161087 is about 8072.2417580248. The cubic root of 65161087 is about 402.4044488538.

The spelling of 65161087 in words is "sixty-five million, one hundred sixty-one thousand, eighty-seven".